▎ 摘　　要

An excellent CMK3/graphene-N-Co (CMK3/G-N-Co) catalytic system was firstly prepared by a simple procedure. It shows excellent catalytic ability in alkaline media for the oxygen reduction reaction (ORR) and the half-peak potential is only 27 mV less than that of the commercial 20% Pt/C catalyst. The product revealed superior stability and tolerance to methanol poisoning effects compared to the commercial 20% Pt/C catalyst. The excellent performance is probably attributed to the doping of the nitrogen and cobalt elements in the CMK3/G, formation of a three-dimensional nanoporous network structure by combining graphene with CMK3 and the promoted charge transfer across the carbon-Co interface and conductivity of the nanocomposite. Since graphene oxide (GO) and CMK3 are commercially available materials, the CMK3/G-N-Co catalytic system for the ORR is a promising alternative to Pt in the practical application of fuel cells. The product may also have potential applications in the fields of metal-air batteries, lithium-ion batteries, supercapacitors, sensors and so on.